SCIENCE & TECHNOLOGY
Understand the science behind your results.
Learn what CORE measures and what your results mean for fitness, metabolism and training.
WHAT CORE MEASURES
CORE measures oxygen, carbon dioxide, and airflow to calculate oxygen use and carbon dioxide production.
Fitness watches track workouts and can estimate VO₂max.
CORE uses breath measurements to assess fitness and metabolism, adding context for training and nutrition.
Why aerobic fitness matters
Higher aerobic fitness is associated with better long-term health. You don’t need to be an elite athlete to benefit.
Measuring your aerobic fitness gives you a starting point for training and a way to track progress toward your performance and long-term fitness goals.
Peak VO₂
Reflects oxygen use during demanding exercise. Higher results generally support greater endurance potential and the ability to go faster or farther.
Ventilatory Thresholds
Distinguish easier from harder exercise, with thresholds expressed through heart rate, speed or power. Reaching a threshold at a higher pace or power on a comparable reassessment can indicate improved endurance fitness.
Peak Fat Oxidation
Your highest estimated fat use per minute. FatMax is the exercise intensity where it occurs.
Exercise Economy
Oxygen needed at a steady pace or power. Using less oxygen at the same workload can indicate improved economy, even if Peak VO₂ stays similar.
Resting Metabolic Rate
A starting point for nutrition planning. Add activity and other energy demands to estimate daily calorie needs. Higher or lower RMR is not inherently better or worse.
Training zones, fuel-use estimates and nutrition targets are calculated outputs. Full reports connect them to practical training and nutrition guidance.
Interpretation & limitations
How to interpret your results.
CORE calculates oxygen uptake and carbon dioxide production from gas and airflow measurements. Results and recommendations depend on these calculations, test protocol, measurement quality and conditions.
